Reference Data Rate Center Directory GRANDMOUND, IA Rate Center GRANDMOUND — IA Data last updated: March 10, 2026 LATA 634 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 41.8237890842089, -90.64820168977361 Area Codes 563 Top Carriers Carrier OCN NXX Count GRAND MOUND COOP. TEL. ASSN. 1191 1
